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Keep cachedRenderer as None when pickling Figure. #17705

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Merged
merged 1 commit into from
Jun 22, 2020

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anntzer
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@anntzer anntzer commented Jun 21, 2020

Figure.__init__ sets cachedRenderer to None, so it's awkward that
pickling and unpickling a figure completely removes the attribute,
causing obscure AttributeErrors.

Closes #17627. (Well, I can't actually repro the issue as reported -- I suspect it has something to do with interagg, i.e. pycharm -- but this should certainly get rid of the AttributeError.)

PR Summary

PR Checklist

  • Has Pytest style unit tests
  • Code is Flake 8 compliant
  • New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

`Figure.__init__` sets cachedRenderer to None, so it's awkward that
pickling and unpickling a figure completely removes the attribute,
causing obscure AttributeErrors.
@tacaswell tacaswell added this to the v3.3.0 milestone Jun 22, 2020
@tacaswell tacaswell merged commit dd8bb2d into matplotlib:master Jun 22, 2020
meeseeksmachine pushed a commit to meeseeksmachine/matplotlib that referenced this pull request Jun 22, 2020
@anntzer anntzer deleted the uncache-renderer branch June 22, 2020 15:34
tacaswell added a commit that referenced this pull request Jun 22, 2020
…705-on-v3.3.x

Backport PR #17705 on branch v3.3.x (Keep cachedRenderer as None when pickling Figure.)
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AttributeError: 'Figure' object has no attribute '_cachedRenderer'
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